Czechoslovakia 1559-1563

$ 2.20

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Czechoslovakia 1559-1563, MNH, $2.60. Michel 1809-1813. 23rd Geological Congress, Prague 1968. Ardspach rocks, Ammonite; Basalt formation, frog skeleton fossil; Rocks, basalt viens, polished agate; Pelecypoda - fossil shell, Betanske Tatra Mountains; Trilobite, Barrande rock formation.